1 files changed, 143 insertions, 0 deletions
diff --git a/bl2/bl2_main.c b/bl2/bl2_main.c
new file mode 100644
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--- /dev/null
+++ b/bl2/bl2_main.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2013, ARM Limited. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <arch_helpers.h>
+#include <console.h>
+#include <platform.h>
+#include <semihosting.h>
+#include <bl_common.h>
+#include <bl2.h>
+
+/*******************************************************************************
+ * The only thing to do in BL2 is to load further images and pass control to
+ * BL31. The memory occupied by BL2 will be reclaimed by BL3_x stages. BL2 runs
+ * entirely in S-EL1. Since arm standard c libraries are not PIC, printf et al
+ * are not available. We rely on assertions to signal error conditions
+ ******************************************************************************/
+void bl2_main(void)
+{
+	meminfo bl2_tzram_layout, *bl31_tzram_layout;
+	el_change_info *ns_image_info;
+	unsigned long bl31_base, el_status;
+	unsigned int bl2_load, bl31_load, mode;
+
+	/* Perform remaining generic architectural setup in S-El1 */
+	bl2_arch_setup();
+
+	/* Perform platform setup in BL1 */
+	bl2_platform_setup();
+
+#if defined (__GNUC__)
+	printf("BL2 Built : %s, %s\n\r", __TIME__, __DATE__);
+#endif
+
+	/* Find out how much free trusted ram remains after BL2 load */
+	bl2_tzram_layout = bl2_get_sec_mem_layout();
+
+	/*
+	 * Load BL31. BL1 tells BL2 whether it has been TOP or BOTTOM loaded.
+	 * To avoid fragmentation of trusted SRAM memory, BL31 is always
+	 * loaded opposite to BL2. This allows BL31 to reclaim BL2 memory
+	 * while maintaining its free space in one contiguous chunk.
+	 */
+	bl2_load = bl2_tzram_layout.attr & LOAD_MASK;
+	assert((bl2_load == TOP_LOAD) || (bl2_load == BOT_LOAD));
+	bl31_load = (bl2_load == TOP_LOAD) ? BOT_LOAD : TOP_LOAD;
+	bl31_base = load_image(&bl2_tzram_layout, BL31_IMAGE_NAME,
+	                       bl31_load, BL31_BASE);
+
+	/* Assert if it has not been possible to load BL31 */
+	assert(bl31_base != 0);
+
+	/*
+	 * Create a new layout of memory for BL31 as seen by BL2. This
+	 * will gobble up all the BL2 memory.
+	 */
+	bl31_tzram_layout = (meminfo *) get_el_change_mem_ptr();
+	init_bl31_mem_layout(&bl2_tzram_layout, bl31_tzram_layout, bl31_load);
+
+	/*
+	 * BL2 also needs to tell BL31 where the non-trusted software image
+	 * has been loaded. Place this info right after the BL31 memory layout
+	 */
+	ns_image_info = (el_change_info *) ((unsigned char *) bl31_tzram_layout
+					      + sizeof(meminfo));
+
+	/*
+	 * Assume that the non-secure bootloader has already been
+	 * loaded to its platform-specific location.
+	 */
+	ns_image_info->entrypoint = plat_get_ns_image_entrypoint();
+
+	/* Figure out what mode we enter the non-secure world in */
+	el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
+	el_status &= ID_AA64PFR0_ELX_MASK;
+
+	if (el_status)
+		mode = MODE_EL2;
+	else
+		mode = MODE_EL1;
+
+	ns_image_info->spsr = make_spsr(mode, MODE_SP_ELX, MODE_RW_64);
+	ns_image_info->security_state = NON_SECURE;
+	flush_dcache_range((unsigned long) ns_image_info,
+			   sizeof(el_change_info));
+
+	/*
+	 * Run BL31 via an SMC to BL1. Information on how to pass control to
+	 * the non-trusted software image will be passed to BL31 in x2.
+	 */
+	if (bl31_base)
+		run_image(bl31_base,
+			  make_spsr(MODE_EL3, MODE_SP_ELX, MODE_RW_64),
+			  SECURE,
+			  bl31_tzram_layout,
+			  (void *) ns_image_info);
+
+	/* There is no valid reason for run_image() to return */
+	assert(0);
+}
+
+/*******************************************************************************
+ * BL1 has this function to print the fact that BL2 has done its job and BL31 is
+ * about to be loaded. Since BL2 re-uses BL1's exception table, it needs to
+ * define this function as well.
+ * TODO: Remove this function from BL2.
+ ******************************************************************************/
+void display_boot_progress(unsigned long entrypoint,
+			   unsigned long spsr,
+			   unsigned long mem_layout,
+			   unsigned long ns_image_info)
+{
+	return;
+}